Ring bit



FIG. 1 is a perspective view of the design;

FIG. 2 is another perspective view of the design;

FIG. 3 is a first end view of the design;

FIG. 4 is another perspective view of the design;

FIG. 5 is a second end view of the design; and,

FIG. 6 is a side view of the design.

The broken lines shown in the drawings illustrate the portions of thering bit that form no part of the claimed design.

CLAIM The ornamental design for a ring bit, as shown and described.